Fluid-packed pump.



i 5i lll E. J. PEENY. FLUID PACKED PUMP.

APPLIGATION FILED MAR. 21. 1905.

PATENTED AUG. 6, 1907.

.UNITED STATES PATENT omnes.,

EDMUND I. FEENY, OF OTTAWA, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO THE OTTAWA BANKING & TRUST COMPANY, OF OTTAWA, ILLINOIS,A CORPORATION OF ILLINOIS.

FLUID-PACKED PUMP.

Patented Aug. 6, 1907.

Application filed March 21, 1905. Serial No. 251,244.

To all whom it may concern:

Bo it known that I, EDMUND J. FEENY, a citizen of the United States, ofOttawa, in the county of Lasalle and State of Illinois, have inventedcertain new and useful Improvements in Fluid-Packed Pumps; and l dohereby declare that-the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention relates to improvements in fluid packed pumps or thosewherein the plunger fits, without friction, the pump cylinder and thepacking between the pump piston and cylinder is afforded by means of anannular jet of fluid projected forcibly against the cylinder wall atsuch space. Such pumps are especially useful for pumping a Huid mingledwith a gritty substance, such, for instance, as crude oil mixed withsand and powdered stone, or in the condition which it leaves the well.The piston may be packed by the same fluid being pumped, inasmuch as thepresence of fine particles in the space between the piston and cylinderis not objectionable as it-would be in case of a frictional contactbetween the piston and cylinder.

'The invention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

In the drawings z-Figure l is a vertical, axial section of a pump madein accordance with my invention, the ligure being broken away toindicate an indeiinite length of the parts between the extreme ends ofconstruction illustrated. Fig. 2 is a modified form of the pump piston.

As shown in the drawings, A designates the pump cylinder or barrelwhich, in practice, is submerged in, or located near the-level of, theliquid to be pumped, and B designates, as a whole, the piston whichreciprocates in said barrel or cylinder, Said piston is made of slightlyless diameter than the interior diameter of the cylinder therebyeliminating friction between the same. The cylinder A is closed at itslower end by a screw-threaded plug C. Said plug is provided with a portcwhich is controlled by a check-valve D that opens on the up, or workingstroke of the piston to admit liquid to the pump cylinder and closes theport during the opposite stroke of the piston. The cylinder may besubmerged in the liquid being pumped, or the port c may communicate witha pipe that is submerged in said fluid.

B2 designates the upper end wall of the cylinder consisting, as hereinshown, of a screw-threaded plug that is apertured for the passagetherethrough of the piston rod Bl to which the piston B is affixed.

E designates the discharge tube of the pump which, as herein shown, hasscrew-threaded engagement with cylinder above the said piston.

the apertured plug B2 and communicates therethrough with the upper endof said cylinder A. The upper end of said pipe or tube discharges into achamber E near the discharge level of the pump, and from said chamberthe liquid is discharged through a pipe E2. The piston rod extendsupwardly through and beyond the discharge pipe, as herein shown. Thepiston rod is hollow for a purpose hereinafter explained. The saidpiston, as herein shown (Fig. l), is of composite structure, itcomprising a spider-like top b provided with a plurality of passages bwhich communicate with the hollow piston rod B1, an annular central orbody part b2 formed with a central bore or passage b3, and an outer ringb4, the outer periphery of which constitutes the active portion of thepiston, but which is out of contact with the cylinder wall. The saidparts have screw-threaded engagement with each other. The passages b1open at their lower ends intoan annular chamber b5 formed in the centralpart b2 of the piston. Said chamber b5 communicates through ports b6with an annular discharge passage b7 formed between the parts b2 and b4of the piston. The passage b3 constitutes the port through which liquid.passes from the lower to the upper end of the cylinder during thedown-stroke of the piston, and said port is controlled by an upwardlyopening check-valve BL which seats upon the upper face of the centralpart b2 of the valve around the upper end of said opening.

The liquid by which the packing of the piston is effected is deliveredunder suitable pressure to the passages b through the hollow piston rodas herein shown. The pump herein shown is of that type in which theliquid is lifted by the up-stroke of the piston. During such up-strokeof the piston the liquid is admitted to 'the lower end of the pumpcylinder through the valved port c and during the succeeding down-strokethe liquid is transferred through the valved passage or port b3 of thepiston to the part of said The means for delivering the liquid to thepiston, by which the piston is packed during its working stroke, towit,-the lifting stroke ofthe piston, of the type of pump herein shown,are so constructed and operated that said liquid is delivered under apressure to the annular passage b7 of the piston sufficient to projectit upwardly and outwardly at a speed greater than that of the piston. Byreason of the flare or inclination of the said annular passage t7 theliquid is projected therefrom in the form of an annular flaring jet orlm which strikes the wall ofthe cylinder just in advance of the piston,during its working stroke, and, therefore, .in advance of the annularspace between the piston and cylinder. Moreover, the size of saidpassage 127, relatively to the volume of liquid forced therethrough, andthe pressure with which the liquid is directed through the passages ofthe piston are so proportioned to the weight of the column of liquidbeing lifted as to prevent such weight overcoming or breaking throughthe upwardly and outwardly projected jet, thereby constituting aneffective packing which prevents the leakage past the piston of theliquid being pumped. The means for furnishing such supply of liquidunder pressure for the purpose described are made as follows: Fdesignates a cylinder which is located above the chamber E. The lowerend of said cylinder is herein shown as open and having screw-threadedengagement with the upper end of said chamber E. The upper end of saidcylinder F is closed by an end wall Fl provided with a stuffing boxoutwardly through which the piston rod extends. F2 designates a pistonfixed to the piston rod and reciprocating in the cylinder F in unisonwith the piston B. The piston F2 is provided with a plurality of ports fwhich afford communication between the chamber E and the cylinder F.Said ports are controlled by a check-valve f1 having the iorm of a ringthat is centrally apertured and has guiding engagement with the pistonrod B1. The piston rod B1 is provided above the piston F2 with one ormore apertures l58 through which the cylinder F above its pistoncommunicates with the hollow piston B. The discharge end of thedischarge pipe E2 is above the cylinder F whereby the cylinder F ismaintained partially or wholly lled when the piston F1 occupies itslowermost position. The operation of this feature of the device is asfollows: During the working or up-stroke of the piston B, the piston F2rises in the cylinder F and by reason of the consequent reduction of thespace for the liquid therein, said liquid passes through the perforation68 of the hollow piston rod, and downwardly through said piston rod tothe hollow piston B, from whence it is directed through the annularpassage 67 of said cylinder in a manner to pack the piston as described.During such upstroke of the piston F2 the check-valve f1 is held on itsseat and the escape of the liquid through the ports f prevented. Duringthe next down-stroke of the piston F1, the check-valve f1 is raised topermit the fluid to enter the' cylinder F above the piston F2 and saidcylinder is hlled when the piston F1 reaches the limit of itsdown-stroke. The speed at which the iilm of liquid is projected from theannular passage 67 is regulated by the size of the cylinder F and thearea of the said passage 57; and such regulation is made in eachinstance to produce the required speed of the liquid to overcome thetendency of the pumped liquid to escape downwardly past the piston, duetothe weight of the column of liquid above the piston B.

In Fig. 2 is shown a modified form of pumping piston, designated, as awhole, by B5. Said piston is made of two parts, to wit,-a part b9 havinga hollow nipple bw when assembled, constitutes a continuation of thepassages b, and bears the same relation to said piston as the annularpassage t7 bears to the piston B of the principal construction. The partb12 of said piston B5 is providedwith a port or passage 514 controlledby a check-valve 515. The operation ot' this pistonis essentially likethat of the piston B before described.

It is to be understood that the term fitting without frictional contacttherein, meaning the cylinder, is to be interpreted as to cover a pistonwhich operates in the cylinder without a working fit and whereinA theiiuid packing arrangement herein disclosed operates to produce theoperative packing between the cylinder and piston. So far as thestructure of the piston is concerned therefore, it is evident that thisfeature of my invention may be embraced in pistons varying widely fromthe specific construction herein illustrated.

lt will be observed also that further structural details of the pumpherein illustrated may be varied within the scope of my invention and ldo not wish to be limited to such details excepting as hereinafter madethe subject of specific claims.

I claim as my invention 1. In a pump, the combination with thereciprocating piston thereof, and a hollow piston rod, of means actingduring the working stroke of the piston for delivering fluid throughsaid piston rod and projecting said Iiuid in the form of an annular jetagainst the wall of the cylinder during the working stroke thereof.

2. In a fluid packed pump, the combination with the reciprocating pistonthereof which lits without frictional contact within said cylinder, anda hollow piston rod, of a source supplying liquid to said hollow pistonrod and means for forcibly directing the liquid from said source andprojecting it in an annular jet against the wall ot' the cylinder andobliquely across the space between the piston and cylinder' during theworking stroke of the piston.

3. In a pumpl the combination with its cylinder and its reciprocatingpiston, fitting without frictional Contact therein, and its hollowpiston rod, of means for delivering` liquid through the piston rod tothe piston and means whereby the liquid so delivered to the piston isprojected in the form of an annular jet against the cylinder wall in amanner to iiuid pack 'the piston.

4. A fluid packed pump comprising a pump cylinder, :1

reciprocating piston iitting without frictional Contact therein, saidpiston being provided with an interior chamber and with an annularpassage leading from said chainber to the circumference of the piston,and means for directing fluid into said chamber and through said passageunder pressure whereby it issues in the form of an annular jet from thepassage across the space between the piston and cylinder. 1 5. A iiuidpacked pump comprising a pump cylinder, a reciprocating piston fittingwithout frictional Contact therein, a hollow piston rod, said pistonbeing provided with a chamber which communicates with said hollow pistonrod and at its advance end with an annular discharge passagecommunicating with said chamber, and discharging liquid obliquely acrossthe space between said piston and the inner wall of the cylinder, andmeans for supplying liquid under pressure through said hollow piston rodto the said piston chamber.

(i. A Huid packed pump comprising a pump cylinder, a reciprocatingpiston fitting without frictional contact therein, a hollow piston rod,said piston being provided with a chamber which communciates with saidhollow piston rod and at its advance end with an annular dischargepassage communicating with said chamber', and discharging liquidobliquely across the space between said piston and the inner wall of thecylinder, and means for supplying liquid under pressure through saidhollow piston rod to the said piston chamber, comprising a cylinderlocated a distance above the pump piston and through which the hollowpiston rod extends, a piston in said cylinder fixed to said rod, meansfor admitting a fluid to said upper cylinder, and an opening in saidpiston rod above the upper piston, whereby, as the piston rises in itscylinder, the liquid is forced through said hollow pistou rod, into thehollow pump cylinder and outwardly therefrom through said annulardischarge passage.

7. A fluid packed pump comprising a cylinder', a piston reciprocatingand fitting without frictional Contact therein, said piston beingprovided with a chamber and with an annular passage communicating withthe chamber and opening at the advance end of the piston near thecircumference thereof, a discharge pipe leading from said cylinder, achamber located near the discharge end of the pump into which the saiddischarge pipe enters, a cylinder communicating with said chamber, saidpiston rod extending upwardly through the chamber and the uppercylinder, a piston in the upper cylinder provided with a valved portthrough which a portion of the pumped liquid is adapted to be divertedinto the said upper cylinder, said piston rod being provided above saidupper piston with an opening, whereby, during the rise of the upperpiston, liquid is forced from said cylinder through the rod to thehollow pumping piston, for the purpose set forth.

8. A liuid packed pump comprising a pump cylinder, a reciprocatingpiston tting without frictional contact therein, a source of uid underpressure located above the said pump piston means for delivering fluidfrom said source to the piston, and means for forcibly dischargingsaidliquid from the piston against the cylinder wall in a manner to fluidpack the piston.

9. In a pump, the combination with the reciprocating piston thereof, anda hollow piston rod, of means acting during the working stroke of thepiston for delivering iluid through said piston rod and projecting saidfluid in the form of an annular jet against the wall of the cylinder,and a discharge pipe for said cylinder surrounding said piston rod.

10. In a pump the combination with the cylinder and its reciprocatingpiston fitting without frictional contact therein, of means fordelivering duid to the piston and means whereby said duid is projectedfrom the piston, under a pressure independent of the weight of the uidresting on the piston, against the wall of the cylinder in a manner toiuid pack the piston.

l1. In a pump, the combination with a cylinder and its reciprocatingpiston, said piston in its operative portion being made of smallerexterior diameter than the interior diameter of the cylinder, therebyproviding an annular space between the piston and cylinder, said pistonbeing provided with a passage communicating with said annular space, ofmeans for delivering a packing huid to said passage of the piston undera pressure independent of the weight of the iiuid resting on the pistonfrom whence it is discharged against the cylinder wall in a manner toiiuid pack the piston.

12. A fluid packed pump comprising in combination with the cylinder andits reciprocating piston fitting without .frictional contact therein, ofmeans for delivering huid to the spaceAbetween the cylinder and piston,at a pressure independent of the weight of the uid resting on thepiston, in a manner to liuid Vpack the piston. v

In testimony, that I claim the foregoing as my invention I aix mysignature in presence of two witnesses, this 13th day of March A. D.1905.

EDMUND .T FEENY.

Witnesses FRANK F. FoLLn'rT, M. OBRITJN4

